[GreenKeys] on-off radio teletype (not FSK)

[tony.podrasky]

I'd say one of the main drawbacks with on/off keying is that
one static glitch at 600 WPM could wipe out A LOT of the
message being sent before things could sync-up again.

UE,
K2EAA - TONY
NNNN
ZCZC


On 02/16/2018 02:01 PM, Nick England wrote:
> How common was on-off radio teletype (not FSK) back in the day?
> Did hams ever use it or was it strictly a military or commercial thing?
>
> This question poked up in my mind as I was scanning the manual for a
> 1952 RTTY converter designed for 60-600 wpm on-off keying.
> http://www.navy-radio.com/manuals/r466-uc-man-91612-5202.pdf
> One block diagram shows it being used to receive on-off tone signals via
> VHF that were generated originally from an AN/FGC-5 which is a gadget
> that time-multiplexes four TTY lines together.
>
> Nick England K4NYW
> www.navy-radio.com <http://www.navy-radio.com>
>

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